Obstetrics & Gynaecology – MCQ 59 – Prenatal diagnosis at 16 weeks of pregnancy

Prenatal diagnosis at 16 weeks of pregnancy can be performed using all of the following, except:
A. Amniotic fluid
B. Maternal blood
C. Chorionic villi
D. Fetal blood

Correct answer : D. Fetal blood

Fetal blood sampling is done by cordocentesis. It is done in the 18-24 weeks gestational age.